Integers k such that the concatenation of 2^k and k is prime.
A262769
Integers k such that the concatenation of 2^k and k is prime.
Terms
- a(0) =3a(1) =23a(2) =63a(3) =261a(4) =281a(5) =291a(6) =4689a(7) =10641a(8) =11231a(9) =12519
External references
- oeis: A262769